A manhole cover installation levelling tool

Abstract

The utility model relates to manhole cover installation equipment technical field especially relates to a kind of manhole cover installation leveling tool, including center disc, four support bars are hinged to the outside of center disc, support bar other end is rotatably connected with stand, one of support bar is equipped with first laser range finder near stand, first fixed unit and second fixed unit are sequentially sleeved on each support bar, second laser range finder is detachably connected on first fixed unit, hook assembly is threadedly connected on second fixed unit.The utility model relates to a kind of manhole cover installation leveling tool, the distance between support bar and road surface and manhole cover is measured by first laser range finder and second laser range finder respectively, the error distance of manhole cover and road surface is determined, the manhole cover is lifted and leveled by hook assembly on second fixed unit, the problem of low leveling precision and slow construction of traditional manhole cover installation leveling method is solved, and the manhole cover installation efficiency is improved and the flatness of manhole cover and road surface is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of manhole cover installation equipment, specifically to a manhole cover installation and leveling tool. Background Technology

[0002] In urban road construction and municipal engineering, the installation of manhole covers is a fundamental and crucial task. The flatness of the installed manhole covers not only affects the quality of road traffic but also their lifespan and the safety of pedestrians and vehicles. The management of manhole covers in municipal infrastructure faces numerous challenges. Traditional methods of manhole cover installation and leveling often rely on the experience of construction workers, using simple tools such as rulers and spirit levels. This approach suffers from low efficiency, insufficient precision, and numerous safety hazards. To address the aforementioned issues, utility model patent CN202422340167.4 provides a road manhole cover installation and leveling device, comprising a cross rod, with support legs at each of the four free ends of the cross rod, limit sleeves fixed to the sides of each of the four rods, a positioning ruler rod slidably installed inside each limit sleeve, a limit threaded hole on the periphery of each limit sleeve, a limit set screw adapted to each limit threaded hole, a base plate fixed to the bottom end of each positioning ruler rod, and a leveling sleeve slidably fitted around each positioning ruler rod, with a leveling threaded hole on the periphery of each leveling sleeve, a leveling set screw adapted to each leveling threaded hole, and a leveling pin fixed to the outer periphery of each leveling sleeve.

[0003] Although the above-mentioned device has a simple structure, is reusable and improves leveling efficiency, its overall frame structure is fixed and not easy to store. During the leveling process of the manhole cover, since the manhole cover has no other supporting structure, multiple operators are required to work together. In addition, since the leveling device is close to the manhole cover, it is easy for the leveling device to shift during the leveling process, which will affect the final leveling effect. Utility Model Content

[0004] The purpose of this utility model is to provide a manhole cover installation and leveling tool, which solves the problems of inconvenient operation and difficult storage of existing manhole cover leveling devices.

[0005] To achieve the above objectives, the basic solution provided by this utility model is as follows: a manhole cover installation and leveling tool, including a central disc, four support rods hinged to the outside of the central disc, and a column rotatably connected to the other end of each support rod. One of the support rods is equipped with a first laser rangefinder near the column. Each support rod is sequentially fitted with a first fixing unit and a second fixing unit. The second laser rangefinder is detachably connected to the first fixing unit, and a hook assembly is threadedly connected to the second fixing unit.

[0006] The principle of this utility model is as follows: When leveling a manhole cover using this tool, first rotate the column at the end of the support rod so that the column is perpendicular to the support rod. Then, place the leveling tool above the manhole cover and rotate each support rod to form a cross shape. Read the numbers from the first and second laser rangefinders. If the numbers returned by the two rangefinders are the same, it means that the manhole cover is level with the road surface, and the manhole cover can be fixed directly. If the numbers returned by the second laser rangefinder are different from those returned by the first laser rangefinder, it means that the manhole cover is not level with the road surface. Then, move the second fixing component to the edge of the manhole cover, pass the hook component on the second fixing unit through the holes around the manhole cover to lift the manhole cover, and then adjust the manhole cover to be level with the road surface by rotating the hook component. Finally, fill and fix the bottom of the manhole cover.

[0007] The advantages of this utility model are as follows: Since the second fixing unit of this leveling tool is equipped with a hook assembly, the manhole cover can be lifted and leveled through this assembly, which is simple and labor-saving; the second fixing unit can move on the support rod to adapt to the installation and leveling of manhole covers of different sizes; the laser rangefinder is used to determine whether the manhole cover is flush with the road surface, which improves the detection accuracy and detection efficiency; the support rod is hinged on the central disc, which is convenient for storage and carrying.

[0008] Option 2, which is a preferred option of the basic option, is that the central disc is formed by connecting two discs, one upper and one lower, with a threaded connection. The installation method is simple and secure. The central disc is equipped with a spherical groove rail, which can support the support rod to rotate at multiple angles within the horizontal range.

[0009] Option 3, which is a preferred option of Option 2, has a handle on the upper part of the central disc to improve handling and movement efficiency.

[0010] Option 4, which is a preferred option of Option 2, has a spherical hinge joint at one end of the support rod. The spherical hinge joint matches the size of the spherical groove rail in the central disk, reducing the wear rate and extending the service life.

[0011] Option 5, which is a preferred option of the basic option, is that the main body of the support rod is a square tube structure, and the square tube is provided with a scale to enhance the deformation resistance of the support rod. The scale ensures the consistency of the movement distance of the first fixing unit and the second fixing unit on each support rod.

[0012] Option 6, which is a preferred option of the basic option, has a frustum-shaped base to increase the load-bearing area and improve support stability. A pull ring is fixed to the side of the column, and a double-headed round hook spring is detachably connected to the pull ring. After use, the two support rods can be fixed by the double-headed round hook spring for easy storage and movement.

[0013] Option 7, which is a preferred option of the basic option, is that the first laser rangefinder is fixed to the support rod, and the head of the first laser rangefinder emitting laser is flush with the bottom of the support rod. That is, the measurement starting point of the rangefinder is completely consistent with the bottom of the support rod, which simplifies the operation process and lowers the threshold for use.

[0014] Option 8, a preferred option of the basic option, includes a sleeve, with a first screw threaded to the upper part of the sleeve and a fixed bracket rotatably connected to the side of the sleeve. A second laser rangefinder is detachably connected to the fixed bracket. The first screw can fix the first fixed unit at a specific position on the support rod, ensuring that the data returned by each second laser rangefinder is the distance on the same radius circle of the manhole cover. The fixed bracket can rotate on the sleeve to prevent the selected second laser rangefinder from being too high and affecting storage.

[0015] Option 9, a preferred embodiment of Option 8, features a first ring connected to the upper hinge of the fixed bracket and a second ring fixed to the lower part. Both the first and second rings are sized to match the second laser rangefinder. The second ring supports the second laser rangefinder, ensuring that its measurement starting point is on the same plane as the bottom of the support rod. The first ring secures the second laser rangefinder to the fixed bracket via a snap-fit ​​mechanism to prevent displacement. Option 10, which is a preferred option of the basic option, includes a second sleeve. The upper part of the sleeve is threadedly connected to a second screw. A boss is rotatably connected to the side of the sleeve. A hook assembly is threadedly connected to the boss. The hook assembly includes a single-ended screw and a hook. The single-ended screw and the hook are rotatably connected. The height of the manhole cover can be adjusted by rotating the single-ended screw. The rotatable connection between the single-ended screw and the hook facilitates the hook passing through the hole on the manhole cover. Moreover, the hook will not rotate during the rotation of the single-ended screw. Attached Figure Description

[0016] Figure 1 This is a perspective view of a manhole cover installation and leveling tool according to this utility model; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a front view of a manhole cover installation and leveling tool according to this utility model; Figure 4 This is a top view of a manhole cover installation and leveling tool according to this utility model; Figure 5 yes Figure 4 Sectional view at point BB; Figure 6 This is an exploded view of the support rod and central disc of a manhole cover installation and leveling tool according to this utility model. Figure 7This is another exploded view of the support rod and central disc of the manhole cover installation and leveling tool of this utility model; Figure 8 This is a top view of the storage state of a manhole cover installation and leveling tool according to this utility model. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments: The reference numerals in the accompanying drawings of the instruction manual include: 1. Central disc, 11. Spherical groove rail, 12. Handle, 2. Support rod, 21. Spherical hinge joint, 3. Column, 31. Pull ring, 32. Double-headed round hook spring, 4. First laser rangefinder, 5. First fixing unit, 51. Sleeve one, 52. First screw, 53. Fixing bracket, 531. First ring, 532. Second ring, 6. Second fixing unit, 61. Sleeve two, 62. Second screw, 63. Boss, 64. Hook assembly, 641. Single-headed screw, 642. Hook, 7. Second laser rangefinder.

[0018] Example like Figures 1 to 8 As shown: A manhole cover installation and leveling tool includes a central disc 1, which is formed by threaded connection of upper and lower discs. A spherical groove rail 11 is provided inside the central disc 1, and a handle 12 is provided on the upper part of the central disc 1. Four support rods 2 are hinged within the spherical groove rail 11 of the central disc 1. The portion of the support rod 2 within the spherical groove rail 11 has a spherical hinge joint 21, the size of which matches the spherical groove rail 11. A column 3 is rotatably connected to the other end of the support rod 2. The bottom of the column 3 is frustoconical, and a pull ring 31 is fixedly connected to the side of the column 3. A double-headed hook spring 32 is detachably connected to the pull ring 31. A first fixing unit 5 and a second fixing unit 6 are sequentially sleeved on each support rod 2. The first fixing unit 5 includes a sleeve 51, with a first screw 52 threadedly connected to the upper part of the sleeve 51. A fixed bracket 53 is rotatably connected to the side, and a second laser rangefinder 7 is detachably connected to the fixed bracket 53. A first ring 531 is connected to the upper part of the fixed bracket 53 by a hinge, and a second ring 532 is fixedly connected to the lower part of the fixed bracket 53. The dimensions of the first ring 531 and the second ring 532 match those of the second laser rangefinder 7. The second fixing unit 6 includes a sleeve 61, and a second screw 62 is threadedly connected to the upper part of the sleeve 61. A boss 63 is rotatably connected to the side of the sleeve 61, and a hook assembly 64 is threadedly connected to the boss 63. The hook assembly 64 includes a single-headed screw 641 and a hook 642, which are rotatably connected. A first laser rangefinder 4 is fixedly connected to one of the four support rods 2 near the column 3. The laser emitting head of the first laser rangefinder 4 is flush with the bottom of the support rod 2.

[0019] The implementation method of this embodiment is as follows: Before using this leveling tool, first place one end of each of the four support rods 2 with a spherical hinge joint 21 in the spherical groove 11 at the bottom of the central disk 1. Then, connect the upper part of the central disk 1 to the lower part of the central disk 1 via a thread. Next, thread the first fixing unit 5 and the second fixing unit 6 onto each support rod 2 in sequence. Then, fix the second laser rangefinder 7 into the fixing bracket 53 on the first fixing unit 5. Finally, place this leveling tool on a horizontal surface for calibration. If there is a discrepancy between the data returned by the second laser rangefinder 7 and the first laser rangefinder 4, the position of the second laser rangefinder 7 in the fixing bracket 53 needs to be adjusted until the data returned by the second laser rangefinder 7 and the first laser rangefinder 4 are the same.

[0020] When using this leveling tool, rotate the column 3 so that it is perpendicular to the support rod 2. Then, place the leveling tool above the manhole cover and move the first fixing unit 5 above the manhole cover. Observe the data returned by the first laser rangefinder 4 and the second laser rangefinder 7. If the returned data are the same, it means that the manhole cover is currently level with the road surface and no further adjustment is needed; simply fix the manhole cover directly. If the returned data are different, it means that there is a certain gap between the manhole cover and the road surface, and the manhole cover needs to be leveled. First, move the second fixing unit 6 on the support rod 2 to the edge of the manhole cover and rotate the second screw 6. 2. Fix the second fixing unit 6 in the current position, then rotate the single-head screw 641 to adjust it to the appropriate position, and then insert the hook 642 into the holes around the manhole cover. Observe the data returned by the second laser rangefinder 7, and rotate the single-head screw 641 to adjust the height of the manhole cover until the data returned by the second laser rangefinder 7 is the same as the data returned by the first laser rangefinder 4. At this time, the manhole cover is at the same level as the road surface. Next, use concrete to fill the empty area at the bottom of the manhole cover until the manhole cover is fixed in the current position. Remove the hook 642 to complete the leveling of the manhole cover.

[0021] After using this leveling tool, loosen the first screw 52 and the second screw 62, then rotate the fixing bracket 53 on the first fixing unit 5 and the boss 63 on the second fixing unit 6 respectively, so that the second laser rangefinder 7 and the hook assembly 64 are radially horizontal with the support rod 2. Then rotate the support rod 2 so that each pair of support rods 2 is close to each other. Rotate the column 3 so that the column 3 is radially horizontal with the support rod 2. Then hook the double-headed round hook spring 32 on the column 3 onto the pull ring 31 of the other column 3 that is close to it. Finally, move this leveling tool to the storage space through the handle 12.

[0022] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this invention, and these should also be considered within the scope of protection of this invention. These modifications will not affect the effectiveness of the invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A manhole cover installation and leveling tool, characterized in that, It includes a central disc (1), four support rods (2) are hinged to the outside of the central disc (1), and a column (3) is rotatably connected to the other end of the support rod (2). One of the support rods (2) is equipped with a first laser rangefinder (4) near the column (3). Each support rod (2) is sequentially fitted with a first fixing unit (5) and a second fixing unit (6). A second laser rangefinder (7) is detachably connected to the first fixing unit (5), and a hook assembly (64) is threadedly connected to the second fixing unit (6).

2. The manhole cover installation and leveling tool according to claim 1, characterized in that, The central disk (1) is formed by connecting two disks, upper and lower, with a spherical groove (11) inside.

3. A manhole cover installation and leveling tool according to claim 2, characterized in that, A handle (12) is fixedly provided on the upper part of the central disc (1).

4. A manhole cover installation and leveling tool according to claim 2, characterized in that, One end of the support rod (2) is provided with a spherical hinge joint (21), and the spherical hinge joint (21) is matched with the size of the spherical groove rail (11) in the central disk (1).

5. A manhole cover installation and leveling tool according to claim 1, characterized in that, The main body of the support rod (2) is a square tube structure, and the square tube is marked with scale.

6. A manhole cover installation and leveling tool according to claim 1, characterized in that, The bottom of the column (3) is a frustum, and a pull ring (31) is fixed to the side of the column. A double-headed hook spring (32) is detachably connected to the pull ring (31).

7. A manhole cover installation and leveling tool according to claim 1, characterized in that, The first laser rangefinder (4) is fixed to the support rod (2), and the head of the first laser rangefinder (4) that emits laser light is flush with the bottom of the support rod (2).

8. A manhole cover installation and leveling tool according to claim 1, characterized in that, The first fixing unit (5) includes a sleeve (51), the upper part of which is threaded with a first screw (52), and the side of the sleeve (51) is rotatably connected with a fixing bracket (53), and a second laser rangefinder (7) is detachably connected to the fixing bracket (53).

9. A manhole cover installation and leveling tool according to claim 8, characterized in that, The upper hinge of the fixed bracket (53) is connected to a first ring (531), and the lower part is fixed to a second ring (532). The dimensions of the first ring (531) and the second ring (532) are both matched with the second laser rangefinder (7).

10. A manhole cover installation and leveling tool according to claim 1, characterized in that, The second fixing unit (6) includes a second sleeve (61), the upper part of which is threaded with a second screw (62), and the side of the second sleeve (61) is rotatably connected with a boss (63). The boss (63) is threadedly connected with a hook assembly (64), which includes a single-ended screw (641) and a hook (642). The single-ended screw (641) and the hook (642) are rotatably connected.

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